Device for the production of yaourt or the like



DEVICE FOR J. B.'R. SAVARY THE PRODUCTION 0F YAOURT 0R THE LIKE Filed Oct. 5, 1951 J B. R

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atented Aug. 25, 193$ aosazse FOR THE PRODUCTION OF YAUURT R THE MIKE .lean ptiste Raoul Savary, Paris, France l Application October 5,

1931, Serial No. 567,077

In France December 3, i930 l Claim.

The present invention has for object a method and devices for the production of yaourt or the like.

Generally speaking, for manufacturing yaourt, milk is concentrated by slowly or rapidly heating it and, when it has cooled down to a suitable temperature (about 40 to 50 CJ, a special ferment (Maya), or yaourt made the day before, is incorporated thereinto. The milk thus treated is slowly brought back to thesurrounding temperature, during a period varying from seven to twenty hours, according to the different methods oi treatment employed.

The slow cooling which constitutes the last operation oi the treatment, is extremely delicate. ilictually, this cooling is edected in stoves, the

' source oi heat oi which is progressively reduced.

Such a procedure necessitates the use of a source oi heat and oi adjusting or controlling means.

lin order to remedy these inconveniences, it has been proposed to store the milk treated in vessels having atherrnanous walls. 'i'lfiissolution does not give entire satisfaction., as it necessitates, for cach portion oi yaourt, a special vessel which is fragile and costly.

The present invention has tor object to remedy the above mentioned inconveniences, and the method oi manufacture oi yaourt forming the subjectmatter oi the said invention is characterized in that the product, heated to about 50 C. in ordinary vessels, is protected against loss oi heat by inserting these vessels in an enclosure having walls-which are non-conductors of heat, .so that the cooling down to the surrounding tem= perature should take place in about three hours.

'.i'he invention has for further object an enclosure which is nonconductor ol heat, tor carrying out the process, this enclosure being provided with a parabolic inner wall for correctly renecting heat on the treated product.

The invention has also for object means for carrying out the method previously set forth; these means, which are extremely variable, are

' all included in the scope of the invention. A

(Cl. (i-59) form of construction oi the vessels containing Y yaourt and of the enclosure.

The accompanying drawing illustrates, by way of example only, forms of construction of a non- Fig. 1 comprises a removable bell l which rests 15V on a non-conducting tray 2 on which the vessels te containing yaourt are placed.

The bell is constituted by two walls la and ib lattached at t and t to a non-conducting crown ti (made of cork, bakelite or-the like). The chamber separating both Walls is filled With a suitable non-conducting material t. The casing i is preferably provided, at its upper part, with a gripping knob lc. y

The tray 2 is made in the same way as the bell. 25

ln the form of construction illustrated in Fig.

1, the tray t is provided with a plate it, made of cardboard for instance, on which is secured a metal support il in the shape of an inverted bowl, so as to constitute an air chamber it. A metal casing it having an embossed portion it forming a bearing bead, is peripherally bent down to-hold the support ii against the plate ill, the edge it of the casing clamping the edge iiab of the support with interposition ol a non-conducting ring it made of any suitable material. It will be seen that the casing it is thermally isolated irom the support il. I

The inner wall ib oi' the bell touches the support il, and the outer wall la comes in contact 4o with the casing it.

An enclosure (bell and tray) is thus obtained, this enclosure having an inner wall (ib and il) and an outer wall (ia and it).

Besides, it will be noted that, according to the invention, the walls iEL and ib are perfectly polished. 'The polishing of ib is given a high iinish for constituting a reflector for the calorilc rays.

Figure 3 illustrates a constructional modiiication of a tray l which, in this case, comprises a plate t1, made of cork or like material, and reinforced by a metal sheet il, forming together, with a suitable ring, a ledge 2a.

The tray might be simply constituted by a non-conductingplate. l

k The applicant has found that a non-conducting enclosure, made as previously set forth, a1- lows slow cooling of yaourt placed in the vessels 5, the period of cooling corresponding to the desired time.

It will also be noted that the method according to the invention and the apparatus rdescribed for carrying it into practice allow one to obtain yaourt of excellent quality in a relatively'reduced time.

In fact the applicant has found that the period of treatment in the non-conducting enclosure does not substantially exceed three hours, thus reducing by half the time actually necessary for obtaining yaourt of the same quality by the methods previously known.

The apparatus described ensure the treatment of very variable. quantities of yaourt and this allows the said apparatus, according to their dimensions, to be used either by manufacturers, or by private individuals for their own use.

Figure 4 is a plan view of a form of construction in which the vessels 5u are of hexagonal shape, thus allowing reduction of the space occupied by the apparatus.

It is obvious) hat the form of construction described and illustrated is only a simple example capable of receiving numerous modifications which, as long as they do not alter in any way the main features above set forth and the result desired, remain included in the scope of the present invention.

What I claim as my invention and desire to secure by Letters Patent is:-

In an apparatus for the manufacture of yaourt, in combination; a bell having athermanous walls constituted by an inner polished metallic wall, an outer polished metallic wall and a heat-insulating material separating the two metallic walls which have no point of contact, a base having athermanous walls constituted by a. polished metallic wall situated entirely outside the enclosure or space limited by the bell and its base, a second metallic wall projecting into the interior of the enclosure or space and a heat-insulating material separating the two metallic 20 walls which have not point of contact, the said heat-insulating material appearing in the annular supporting region of the bell for constituting an air-tight joint between the bell and the 25 base.

JEAN BAPTISTE RAOUL SAVARY. 

